GPT-5.5 vs o3
| GPT-5.5 | o3 | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 400,000 | 200,000 |
| Release Date | — | 2025-04-16 |
| Input Price | $5.00/ 1M tokens | $2.00/ 1M tokens |
| Output Price | $30.00/ 1M tokens | $8.00/ 1M tokens |
| Best for | coding · professional work · complex reasoning · agents | mathematics · coding · scientific reasoning · complex planning |
Capabilities
| GPT-5.5 | o3 | |
|---|---|---|
| Vision | ✓ | ✗ |
| Reasoning | ✓ | ✓ |
| Coding | ✓ | ✓ |
| Audio | ✗ | ✗ |
| Tools | ✓ | ✓ |
| Long Context | ✓ | ✓ |
Ranking Comparison
| GPT-5.5 | o3 | |
|---|---|---|
| Overall | 47.1 | 87.9 |
| Benchmark | 0 | 93 |
| Capability | 85.7 | 57.1 |
| Price Efficiency | 100 | 100 |
| Context | 100 | 100 |
Overall = Benchmark 50% + Capability 20% + Price Efficiency 20% + Context 10%.
Benchmark Comparison
| GPT-5.5 | o3 | |
|---|---|---|
| Coding | — | — |
| Reasoning | — | — |
| Math | — | — |
| Vision | — | — |
Price History
GPT-5.5
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $5.00 | $30.00 |
/ 1M tokens
o3
| Date | Input | Output |
|---|---|---|
| 2026-08-05 | $2.00 | $8.00 |
/ 1M tokens
GPT-5.5
OpenAI's most advanced model for coding and professional work, with a 400K context window.
o3
OpenAI reasoning model that thinks before answering, strongest on STEM and logic.
Frequently Asked Questions
Which model is better: GPT-5.5 or o3?
Based on overall scores, o3 ranks higher (87.9 vs 47.1). See the comparison table for a full breakdown.
Which model is cheaper: GPT-5.5 or o3?
o3 is cheaper: $2 vs $5 per 1M input tokens.
What are the capability differences between GPT-5.5 and o3?
GPT-5.5: Vision